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W. M FULLER.

ROTARY ENGINE.

V N0T 6, Patented July 26, 1870. v

To all whom it may concern.-

WILLARD M.,FULLER, onnnw'ronn, N. Y.

Lam Patent No, loatcaamz July 2o,1s7o.

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; The Schedule referred to in-these Letters r-wu: and making part of the same l Be it known that 1,,W1rmann'M. Formulaof a,

' city and county of New York and State of New York, have invented certain new anduseful Improvements in Rotary Engines, of: which thefollowing is a speoiiieation, referencebeing had to the-.. accompanying drawing making a part thereof, in which- Figure 1 representsa vertical section.-

, Eigure 2, a transverse i'ertical section.

Figures 3, 4, and 5, views of details detached.- Like'letters refer to the same parts in all of the figures. I

Thenature of my invention relates to that class of rotary steam-engines which has folding wings on pistons; and V Its nature consists in an improved mode of hanging the wings and supporting them; in an improved mode of constructing the inolins which guide the wings in opening; and in a novel combination andiarran'gement of the parts. I

i To enable others skilledinth'e art to make and use my improved machine, -I will describeits constructionand operation.

In the drawingl s j A represents the outer case or cylinder:

A and B, the ends or heads; l

C, the interior cylinder or case, providedwith suitable recesses for the folding of the wings;

D and D, end-plates or disks; fitting the interior diameter of the case A, and attached to the cylinderO; p 1

E, the shaft;

. F, journal'- arings for the shaft, which may be provided with smiling-boxes;

G, a base or frame, suitable for'the support of the case H, a segment or cut-oil, fitting the inner cylinder O, its'entire inner surface;

I, a bolt, foriitstening-it to the case r I J, a rod or bar, curved and inclined from the inner edge of the segment to the ease, for making the wings will continue to be efieotiv e as they wear away.

rue hubs or cylindrical portions of these wings fit looselyin the cavities of the cylinder 0, and they havetheir hearings in the disks D by means of the endsO.

The pressure against the piston makes it fit against one shoulder of its socket orecavity, so that, it-is sufticiently steam-tight there, with but little friction,

and, bythe use ofthedisks D, there is but little fi'ic-- than upon the ends of the pistons, none in fact, ex-

cept from the movement of the pistons when folding or opening, and consequently no perceptible wear.

The best proportions for making the segment or cut-ofl' H, with its inclines, is to make the segment equal in length to one-sixth of the circumference of the case, so that it will be longer than the recess for the piston, and thereby prevent the escape of steam, and endure great wear, and each of the bars J and ,K one-half longer, or equal to one-fourth of 'the circumference'. When the engine runs only in one direction, the bar or incline K may be shortened.

By the use of the bar J, the steam is permitted to enter,- behind the piston as soon as'it commences to open, thus holding it up against the pressure of the inflnwing steam as it passes the opening L, equalizing the pressure, thereby avoiding the sudden and violent beating of the piston against th'e'case. By the use of along segment or cut-off; the end plates or disks D and the wings made wider than the space between the two cylinders, I avoid all packing, which is one of the chief merits of my machine.

The spring may be'made as shown, or in any other desired form, as'its principal function is to start the wing, so as to insure its opening. Having thus fully described my improved machine, What I claim as new, and desire to secure. by Letters Patent, is-

1. The folding wings orjpistons M, when provided with journals 0, bearing in'the disks, in combination with the disks .1) and D and the cylinder 0, substam tially as specified.

2. The incline bar J, in combination with the long- .segment or eut-oif H, when constructed and operating substantially as and for the purposes described.

- ,3. The combination and arrangement of the case D, and segment H, provided with the; bar J, with suitable steam and exhaust-pines. substantially'as specified. a WILLARD M. FULLER. Witnesses: v

WM. H.'SM1TH, A; H. Nouns,-

A B, ylinder 0, wings M, springs. P, plates or disks 

